Multi-vinyl linked benzothiadiazole conjugated polymers: high performance, low crystalline material for transistors

2017 ◽  
Vol 53 (58) ◽  
pp. 8176-8179 ◽  
Author(s):  
Xianfeng Liang ◽  
Shilei Gu ◽  
Zhengxu Cai ◽  
Wandong Sun ◽  
Luxi Tan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
High Performance ◽  
Hole Mobility ◽  
Crystalline Material ◽  
Low Crystalline ◽  
Low Crystallinity

A multi-vinyl linked conjugated polymerPTBTVexhibits a hole mobility of up to 3.2 cm2V−1s−1with relatively low crystallinity.

Methoxylation of quinoidal bithiophene as a single regioisomer building block for narrow-bandgap conjugated polymers and high-performance organic field-effect transistors

2020 ◽  
Vol 8 (43) ◽  
pp. 15168-15174 ◽  
Author(s):  
Yunlong Sun ◽  
Yunpeng Zhang ◽  
Yang Ran ◽  
Longxian Shi ◽  
Qingsong Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Building Block ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Hole Mobility ◽  
Methoxyl Group ◽  
Organic Field Effect Transistors ◽  
Narrow Bandgap

Methoxyl group was introduced to obtain isomer-free methoxylation quinoidal bithiophene building block. Four polymers displayed narrow bandgap (<1.20 eV) and hole mobility of up to 2.70 cm2 V−1 s−1.

scholarly journals Engineering Donor-Acceptor Conjugated Polymers for High-Performance and Fast-Response Organic Electrochemical Transistors

2020 ◽  
Author(s):  
Hanyu Jia ◽  
Zhen Huang ◽  
Peiyun Li ◽  
song zhang ◽  
yunfei wang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
High Performance ◽  
High Mobility ◽  
Hole Mobility ◽  
Fast Response ◽  
Ion Diffusion ◽  
Order Of Magnitude ◽  
Donor Acceptor ◽  
Systematic Solution ◽  
Organic Electrochemical Transistors

To date, high-performance organic electrochemical transistors (OECTs) are all based on polythiophene systems. Donor-acceptor (D-A) conjugated polymers are expected to be promising materials for OECTs owing to their high mobility and comparatively low crystallinity (good for ion diffusion). However, the OECT performance of D-A polymers lags far behind that of the polythiophenes. Here we synergistically engineered the backbone, side chain of a series of diketopyrrolopyrrole (DPP)-based D-A polymers and found that redox potential, molecular weight, solution processability, and film microstructures are essential to their performance. Among the polymers, P(bgDPP-MeOT2) exhibited a figure-of-merit (μC*) of 225 F cm<sup>–1</sup> V<sup>–1</sup> s<sup>–1</sup>, <a>over one order of magnitude higher than previously reported D-A polymers. Besides, the DPP polymers exhibited high hole mobility over 2 cm<sup>2</sup> V</a><sup>−1</sup> s<sup>−1</sup>, significantly higher than all D-A polymers employed in OECTs, leading to fast response OECTs with a record low turn-off response time of 30 μs. <a>The polymer also exhibited better stability than polythiophene systems with current retention of 98.8% over 700 electrochemical switching cycles.</a> This work provides a systematic solution to unleash the high-performance and fast-response nature of D-A polymers in OECTs.

scholarly journals Aggregation control in natural brush-printed conjugated polymer films and implications for enhancing charge transport

2017 ◽  
Vol 114 (47) ◽  
pp. E10066-E10073 ◽  
Author(s):  
Gang Wang ◽  
Wei Huang ◽  
Nicholas D. Eastham ◽  
Simone Fabiano ◽  
Eric F. Manley ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
Conjugated Polymer ◽  
Processing Technique ◽  
Large Area ◽  
Hole Transporting ◽  
Degree Of Orientation ◽  
Aggregation Control ◽  
Induced Aggregation ◽  
Low Crystallinity

Shear-printing is a promising processing technique in organic electronics for microstructure/charge transport modification and large-area film fabrication. Nevertheless, the mechanism by which shear-printing can enhance charge transport is not well-understood. In this study, a printing method using natural brushes is adopted as an informative tool to realize direct aggregation control of conjugated polymers and to investigate the interplay between printing parameters, macromolecule backbone alignment and aggregation, and charge transport anisotropy in a conjugated polymer series differing in architecture and electronic structure. This series includes (i) semicrystalline hole-transporting P3HT, (ii) semicrystalline electron-transporting N2200, (iii) low-crystallinity hole-transporting PBDTT-FTTE, and (iv) low-crystallinity conducting PEDOT:PSS. The (semi-)conducting films are characterized by a battery of morphology and microstructure analysis techniques and by charge transport measurements. We report that remarkably enhanced mobilities/conductivities, as high as 5.7×/3.9×, are achieved by controlled growth of nanofibril aggregates and by backbone alignment, with the adjusted R2 (R2adj) correlation between aggregation and charge transport as high as 95%. However, while shear-induced aggregation is important for enhancing charge transport, backbone alignment alone does not guarantee charge transport anisotropy. The correlations between efficient charge transport and aggregation are clearly shown, while mobility and degree of orientation are not always well-correlated. These observations provide insights into macroscopic charge transport mechanisms in conjugated polymers and suggest guidelines for optimization.

scholarly journals A vinyl flanked difluorobenzothiadiazole–dithiophene conjugated polymer for high performance organic field-effect transistors

2018 ◽  
Vol 6 (7) ◽  
pp. 1774-1779 ◽  
Author(s):  
Xianfeng Liang ◽  
Wandong Sun ◽  
Yanlin Chen ◽  
Luxi Tan ◽  
Zhengxu Cai ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Conjugated Polymer ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Hole Mobility ◽  
Organic Field Effect Transistors

A vinyl flanked conjugated polymer PTFBTV exhibits a hole mobility up to 2.0 cm2 V−1 s−1 containing possible C–H⋯F hydrogen bonds

scholarly journals Engineering Donor-Acceptor Conjugated Polymers for High-Performance and Fast-Response Organic Electrochemical Transistors

2020 ◽  
Author(s):  
Hanyu Jia ◽  
Zhen Huang ◽  
Peiyun Li ◽  
song zhang ◽  
yunfei wang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
High Performance ◽  
High Mobility ◽  
Hole Mobility ◽  
Fast Response ◽  
Ion Diffusion ◽  
Order Of Magnitude ◽  
Donor Acceptor ◽  
Systematic Solution ◽  
Organic Electrochemical Transistors

To date, high-performance organic electrochemical transistors (OECTs) are all based on polythiophene systems. Donor-acceptor (D-A) conjugated polymers are expected to be promising materials for OECTs owing to their high mobility and comparatively low crystallinity (good for ion diffusion). However, the OECT performance of D-A polymers lags far behind that of the polythiophenes. Here we synergistically engineered the backbone, side chain of a series of diketopyrrolopyrrole (DPP)-based D-A polymers and found that redox potential, molecular weight, solution processability, and film microstructures are essential to their performance. Among the polymers, P(bgDPP-MeOT2) exhibited a figure-of-merit (μC*) of 225 F cm<sup>–1</sup> V<sup>–1</sup> s<sup>–1</sup>, <a>over one order of magnitude higher than previously reported D-A polymers. Besides, the DPP polymers exhibited high hole mobility over 2 cm<sup>2</sup> V</a><sup>−1</sup> s<sup>−1</sup>, significantly higher than all D-A polymers employed in OECTs, leading to fast response OECTs with a record low turn-off response time of 30 μs. <a>The polymer also exhibited better stability than polythiophene systems with current retention of 98.8% over 700 electrochemical switching cycles.</a> This work provides a systematic solution to unleash the high-performance and fast-response nature of D-A polymers in OECTs.

scholarly journals Effect of Side Chain Substituent Volume on Thermoelectric Properties of IDT-Based Conjugated Polymers

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 963
Author(s):  
De-Xun Xie ◽  
Tong-Chao Liu ◽  
Jing Xiao ◽  
Jing-Kun Fang ◽  
Cheng-Jun Pan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Thermoelectric Properties ◽  
Conjugated Polymer ◽  
High Performance ◽  
Charge Carriers ◽  
Side Chain ◽  
Side Chains ◽  
Bulky Substituent ◽  
P Type

A p-type thermoelectric conjugated polymer based on indacenodithiophene and benzothiadiazole is designed and synthesized by replacing normal aliphatic side chains (P1) with conjugated aromatic benzene substituents (P2). The introduced bulky substituent on P2 is detrimental to form the intensified packing of polymers, therefore, it hinders the efficient transporting of the charge carriers, eventually resulting in a lower conductivity compared to that of the polymers bearing aliphatic side chains (P1). These results reveal that the modification of side chains on conjugated polymers is crucial to rationally designed thermoelectric polymers with high performance.

scholarly journals Conjugated Polymer/Graphene Oxide Nanocomposites—State-of-the-Art

2021 ◽  
Vol 5 (11) ◽  
pp. 292
Author(s):  
Ayesha Kausar
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
High Performance ◽  
Main Chain ◽  
State Of The Art ◽  
Industrial Applications ◽  
Facile Synthesis ◽  
Structure Properties

Graphene oxide is an imperative modified form of graphene. Similar to graphene, graphene oxide has gained vast interest for the myriad of industrial applications. Conjugated polymers or conducting polymers are well known organic materials having conducting backbone. These polymers have semiconducting nature due to π-conjugation along the main chain. Doping and modification have been used to enhance the electrical conductivity of the conjugated polymers. The nanocomposites of the conjugated polymers have been reported with the nanocarbon nanofillers including graphene oxide. This review essentially presents the structure, properties, and advancements in the field of conducting polymer/graphene oxide nanocomposites. The facile synthesis, processability, and physical properties of the polymer/graphene oxide nanocomposites have been discussed. The conjugated polymer/graphene oxide nanocomposites have essential significance for the supercapacitors, solar cells, and anti-corrosion materials. Nevertheless, the further advanced properties and technical applications of the conjugated polymer/graphene oxide nanocomposites need to be explored to overcome the challenges related to the high performance.

Balance cathode-active and anode-active groups in one conjugated polymer towards high-performance all-organic lithium-ion batteries

Nano Energy ◽  
2021 ◽  
Vol 86 ◽  
pp. 106055
Author(s):  
Yang Zhao ◽  
Manman Wu ◽  
Hongbin Chen ◽  
Jie Zhu ◽  
Jie Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Conjugated Polymer ◽  
High Performance ◽  
Lithium Ion

Strategies and concepts in n-doped conjugated polymer thermoelectrics

2021 ◽  
Vol 9 (9) ◽  
pp. 5149-5163
Author(s):  
Teck Lip Dexter Tam ◽  
Jianwei Xu
Keyword(s):  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
Chemical Structure ◽  
Structure Engineering

In this review, we discuss strategies & concepts in chemical structure engineering for n-type conjugated polymers & n-dopants that have brought about huge improvements in the performance of n-doped conjugated polymer thermoelectrics in recent years.

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